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Watch more Special Features from CNET - http://cnet.co/1KWRlce From simple sounds transmitted down wire to a high-flying smartphone world, we chart the fascinating history of telephonic technology. Subscribe to CNET: http://bit.ly/17qqqCs Watch more CNET videos: http://www.cnet.com/video Follow CNET on Twitter: http://twitter.com/CNET Follow ...
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